10 February 2011, 04:42 PM ET
Have you ever wondered why most star patterns are associated with specific seasons of the year? Here's why.
10 February 2011, 09:03 AM ET
The first stars in the universe may have been huge, but they weren't the loners astronomers thought.
09 February 2011, 05:51 PM ET
A stunning Valentine's Day photo from space shows a cosmic ring made of black holes and young stars.
09 February 2011, 01:58 PM ET
A new study that suggests the first stars in universe formed in groups, rather than alone, has also revealed a surprising side effect: If conditions were just right, a few of the earliest stars may still be visible today.
07 February 2011, 10:10 AM ET
A supergiant star nearing its death is surrounded by a thick disk of gas and dust that is generally only found around baby stars, as revealed by a new 3D imaging technique.
03 February 2011, 11:40 AM ET
NASA's Kepler mission has discovered its first Earth-size planet candidates and its first candidates in the "habitable zone," the region where liquid water could exist on a planet's surface. One star dubbed Kepler-11 may have as many as 6.
02 February 2011, 06:37 PM ET
An intimate portrait of the newly discovered Kepler-11 planetary system – the most tightly packed planetary system orbiting a single star yet discovered outside of our solar system.
02 February 2011, 01:30 PM ET
A bright galaxy, called NGC 3621, appears to be a good example of a classical spiral galaxy, but astronomers have found that it is actually rather unusual: it does not have a central bulge, and is therefore described as a pure-disk galaxy.
02 February 2011, 01:01 PM ET
Astronomers have discovered an alien solar system containing six planets — including a sunlike star — with five of the newfound worlds orbiting in a close-knit configuration.
02 February 2011, 09:00 AM ET
The Milky Way to the east of the constellation Orion is filled with deep sky gems.
31 January 2011, 03:44 PM ET
NASA's next-generation space telescope could confirm the existence of the oldest galaxy yet seen and peer back even further in time.
28 January 2011, 01:30 PM ET
The constellations of Orion and Taurus point the way to two shining star clusters.
26 January 2011, 01:01 PM ET
Astronomers have peered back in time further than ever before, spotting a galaxy that formed less than 500 million years after birth creation of our universe.
25 January 2011, 05:11 PM ET
A huge star has been photographed slamming through a barrier of cosmic dust.
21 January 2011, 06:18 PM ET
Next Wednesday (Jan. 26), NASA is expected to announce a major discovery made by researchers using the Hubble Space Telescope.
19 January 2011, 02:20 PM ET
A scorching-hot alien planet may be causing its parent star to inflate and deflate like a balloon.
19 January 2011, 02:09 PM ET
Key new clues in the mystery behind what feeds the monstrous supermassive black holes have come to light.
14 January 2011, 05:01 PM ET
The two cousin galaxies couldn't look more different from one another.
14 January 2011, 07:23 AM ET
Scientists have released the largest digital color image of the sky ever made, and it's free to whoever wants to take a look.
13 January 2011, 01:08 PM ET
A dwarf galaxy that is too dim to see but is thought to orbit the Milky Way could soon be found using a new mathematical technique that analyzes ripples in the distribution of gas in spiral galaxies.
13 January 2011, 12:04 PM ET
Researchers have mapped out the dark matter in a sample of huge galaxies.
12 January 2011, 07:08 PM ET
Astronomers have now measured the most massive black hole known from our cosmic neighborhood, a huge beast with a mass of 6.6 billion suns, a new study reports.
12 January 2011, 04:45 PM ET
An advanced camera on a South American telescope will search for clues to why the universe's expansion is speeding up.
12 January 2011, 04:15 PM ET
The lightweight stars originally looked like planets to the exoplanet-hunting observatory.
12 January 2011, 01:02 PM ET
Cosmic lenses created by pockets of warped space-time may be throwing off the population count of the earliest galaxies.
12 January 2011, 01:01 PM ET
Study finds a 'protocluster' of galaxies as they were only a billion years after the Big Bang
10 January 2011, 05:20 PM ET
The newly discovered Kepler-10b isn't the first alien planet that astronomers have announced is rocky. But they're more sure about Kepler-10b's composition than they've been before, because they know its host star so well.
10 January 2011, 03:46 PM ET
NASA's Hubble Space Telescope is helping demystify one of the strangest space objects ever seen.
10 January 2011, 01:14 PM ET
The alien solar system could reveal why many planets orbit so close to their parents.
10 January 2011, 10:00 AM ET
Jupiter, the moon and Uranus will over a skywatching show as the crescent moon passes north of both planets on Jan. 9 and Jan. 10.
09 January 2011, 01:01 PM ET
Which comes first: a galaxy or its central black hole?
06 January 2011, 12:33 PM ET
Infrared and X-ray images show our neighboring galaxy in a whole new light.
05 January 2011, 11:28 AM ET
A gorgeous new image from the European Southern Observatory shows the glowing, blue Lagoon Nebula - a hotbed of stellar activity - amid a backdrop speckled with bright stars.
05 January 2011, 09:34 AM ET
For years, scientists thought that huge black holes needed to gorge on matter from colliding galaxies. But that may not be, a new study finds.
04 January 2011, 06:28 PM ET
A ten-year-old amateur astronomer became the youngest person to have ever discovered a stellar explosion, after detecting a supernova in a galaxy within the constellation of Camelopardalis.
29 December 2010, 05:17 PM ET
Intelsat's "zombie" Galaxy 15 satellite that spent months adrift in orbit recently came back to life by resetting itself after an unprecedented malfunction.